The Court of Justice of the European Union (CJEU) has ruled that significant FIFA regulations governing the transfer system are incompatible with EU law, a decision that could have far-reaching implications for club football. This ruling stems from a case involving former midfielder Lassana Diarra, who played for clubs such as Chelsea, Arsenal, and Portsmouth. Diarra challenged FIFA's rules concerning players' freedom of movement, leading to the court's findings that certain transfer regulations impose restrictions that violate EU principles. The court's decision includes two critical judgments: first, it determined that FIFA's rules on transfer authorization hinder players' freedom of movement, a fundamental aspect of EU law. Second, it found that the existing requirement for purchasing clubs to pay compensation for players who terminate contracts "without just cause" is anticompetitive. This landmark ruling is expected to create significant uncertainty within the football industry, potentially reshaping the landscape of player transfers and contracts in the future.